JPS5584642A - Control of plastic injection molding - Google Patents
Control of plastic injection moldingInfo
- Publication number
- JPS5584642A JPS5584642A JP15750278A JP15750278A JPS5584642A JP S5584642 A JPS5584642 A JP S5584642A JP 15750278 A JP15750278 A JP 15750278A JP 15750278 A JP15750278 A JP 15750278A JP S5584642 A JPS5584642 A JP S5584642A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- cavity
- holding
- resin
- integral
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000001746 injection moulding Methods 0.000 title 1
- 239000011347 resin Substances 0.000 abstract 3
- 229920005989 resin Polymers 0.000 abstract 3
- 238000002347 injection Methods 0.000 abstract 2
- 239000007924 injection Substances 0.000 abstract 2
- PCTMTFRHKVHKIS-BMFZQQSSSA-N (1s,3r,4e,6e,8e,10e,12e,14e,16e,18s,19r,20r,21s,25r,27r,30r,31r,33s,35r,37s,38r)-3-[(2r,3s,4s,5s,6r)-4-amino-3,5-dihydroxy-6-methyloxan-2-yl]oxy-19,25,27,30,31,33,35,37-octahydroxy-18,20,21-trimethyl-23-oxo-22,39-dioxabicyclo[33.3.1]nonatriaconta-4,6,8,10 Chemical compound C1C=C2C[C@@H](OS(O)(=O)=O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2.O[C@H]1[C@@H](N)[C@H](O)[C@@H](C)O[C@H]1O[C@H]1/C=C/C=C/C=C/C=C/C=C/C=C/C=C/[C@H](C)[C@@H](O)[C@@H](C)[C@H](C)OC(=O)C[C@H](O)C[C@H](O)CC[C@@H](O)[C@H](O)C[C@H](O)C[C@](O)(C[C@H](O)[C@H]2C(O)=O)O[C@H]2C1 PCTMTFRHKVHKIS-BMFZQQSSSA-N 0.000 abstract 1
- 238000001514 detection method Methods 0.000 abstract 1
- 238000000465 moulding Methods 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
PURPOSE:To improve dimensional and weight precision of a molded article as well as molding yield by so controlling the pressure holding time for each shot that the time integral of cavity pressure may be constant. CONSTITUTION:Cavity pressure is detected by a pressure sensor 9 fitted in a cavity 7, and the detection signal is fed to a microcomputer 11 through an analog-to-digital converter 10. A cavity pressure profile ABCD (A: start of resin injection; B: completion of injection; C to D: a step where a holding pressure is loaded for preventing a molded article from shrinking; D: gate seal point) is so controlled that the time integral Q(t) of cavity pressure may be constant irrespective of changes in resin temperature, mold temperature, resin lot number, and the like. That is, the integral Q(t) is compared with a setpoint in a pressure integrated-value setter 12, and a holding pressure cut-off device 15 releases the holding pressure in an injector to control the pressure holding time when the two compared values are equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15750278A JPS5849172B2 (en) | 1978-12-22 | 1978-12-22 | Plastic injection molding control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15750278A JPS5849172B2 (en) | 1978-12-22 | 1978-12-22 | Plastic injection molding control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5584642A true JPS5584642A (en) | 1980-06-26 |
| JPS5849172B2 JPS5849172B2 (en) | 1983-11-02 |
Family
ID=15651079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15750278A Expired JPS5849172B2 (en) | 1978-12-22 | 1978-12-22 | Plastic injection molding control method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5849172B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1985002813A1 (en) * | 1983-12-28 | 1985-07-04 | Fanuc Ltd | Injection molding machine |
| EP0752304A1 (en) * | 1995-07-04 | 1997-01-08 | Battenfeld GmbH | Hydraulic system for plastic processing machines, especially for injection moulding machines |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6251458B1 (en) | 2016-12-04 | 2017-12-20 | 安彦 浩志 | Sound equipment |
-
1978
- 1978-12-22 JP JP15750278A patent/JPS5849172B2/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1985002813A1 (en) * | 1983-12-28 | 1985-07-04 | Fanuc Ltd | Injection molding machine |
| EP0752304A1 (en) * | 1995-07-04 | 1997-01-08 | Battenfeld GmbH | Hydraulic system for plastic processing machines, especially for injection moulding machines |
| US5762973A (en) * | 1995-07-04 | 1998-06-09 | Battenfeld Gmbh | Hydraulic operating system for plastics processing machines, especially for injection molding machines |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5849172B2 (en) | 1983-11-02 |
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